Re: PG inconsistency

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We are using v0.80.4. Just would like to ask for general suggestion here :)

Thanks,
Guang

________________________________
> From: malmyzh@xxxxxxxxx 
> Date: Thu, 6 Nov 2014 13:46:12 +0000 
> Subject: Re:  PG inconsistency 
> To: yguang11@xxxxxxxxxxx; ceph-devel@xxxxxxxxxxxxxxx; 
> ceph-users@xxxxxxxxxxxxxx 
> 
> What is your version of the ceph? 
> 0.80.0 - 0.80.3 
> https://github.com/ceph/ceph/commit/7557a8139425d1705b481d7f010683169fd5e49b 
> 
> Thu Nov 06 2014 at 16:24:21, GuangYang 
> <yguang11@xxxxxxxxxxx<mailto:yguang11@xxxxxxxxxxx>>: 
> Hello Cephers, 
> Recently we observed a couple of inconsistencies in our Ceph cluster, 
> there were two major patterns leading to inconsistency as I observed: 
> 1) EIO to read the file, 2) the digest is inconsistent (for EC) even 
> there is no read error). 
> 
> While ceph has built-in tool sets to repair the inconsistencies, I also 
> would like to check with the community in terms of what is the best 
> ways to handle such issues (e.g. should we run fsck / xfs_repair when 
> such issue happens). 
> 
> In more details, I have the following questions: 
> 1. When there is inconsistency detected, what is the chance there is 
> some hardware issues which need to be repaired physically, or should I 
> run some disk/filesystem tools to further check? 
> 2. Should we use fsck / xfs_repair to fix the inconsistencies, or 
> should we solely relay on Ceph's repair tool sets? 
> 
> It would be great to hear you experience and suggestions. 
> 
> BTW, we are using XFS in the cluster. 
> 
> Thanks, 
> Guang 
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